Improvements in adding/deleting properties.
Improvements in adding/deleting properties.

sharidas/core,owncloud/core,owncloud/core,Ardinis/server,andreas-p/nextcloud-server,owncloud/core,andreas-p/nextcloud-server,phil-davis/core,sharidas/core,bluelml/core,pollopolea/core,nextcloud/server,IljaN/core,pmattern/server,xx621998xx/server,whitekiba/server,endsguy/server,xx621998xx/server,pollopolea/core,michaelletzgus/nextcloud-server,IljaN/core,pixelipo/server,cernbox/core,endsguy/server,michaelletzgus/nextcloud-server,Ardinis/server,pmattern/server,pmattern/server,michaelletzgus/nextcloud-server,whitekiba/server,nextcloud/server,bluelml/core,pmattern/server,cernbox/core,xx621998xx/server,lrytz/core,sharidas/core,cernbox/core,pmattern/server,jbicha/server,cernbox/core,IljaN/core,andreas-p/nextcloud-server,nextcloud/server,lrytz/core,owncloud/core,jbicha/server,jbicha/server,whitekiba/server,bluelml/core,lrytz/core,whitekiba/server,pollopolea/core,owncloud/core,Ardinis/server,pixelipo/server,sharidas/core,pixelipo/server,endsguy/server,lrytz/core,bluelml/core,endsguy/server,whitekiba/server,michaelletzgus/nextcloud-server,endsguy/server,jbicha/server,Ardinis/server,andreas-p/nextcloud-server,pixelipo/server,bluelml/core,xx621998xx/server,xx621998xx/server,nextcloud/server,Ardinis/server,pollopolea/core,cernbox/core,jbicha/server,pixelipo/server,IljaN/core,andreas-p/nextcloud-server,lrytz/core,sharidas/core,pollopolea/core,IljaN/core